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(No Model.)

E. OQMULFORD.

Saw Tooth.v K 1 No. 236,690. K Patented Jan; 18', 1881.

UNITED STATES EWING C. MULFORD, OF TRENTON, NEW JERSEY.

SAW-TOOTH.

SPECIFICATION forming part of Letters Patent No. 236,690, dated January18, 1881. Application filed December 2, 1880. (No model.)

To all 'whom it may concern:

Be it known that I, EWING C. MULFORD, a citizen of the United States,residing at Trenton, in the county of Mercer and State of New Jersey,have invented certain new and useful Improvements in Saw-Teeth; and Ivdo hereby declare the following to be a full, clear, and exactdescription ofthe invent-ion, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying' drawings, and to the letters or gures of referencemarked thereon, which forni a part of this specification.

This invention relates to that class of insertible saw-teeth which aresecured to the saw-plate by means of a locking-shank and rivet, so thatthey may be readily detached and replaced without the necessity ofemploying any special implement; andthe invention consists in certaindetails of construction and peculiarities of form in the tooth, lookingshank, and recessed sawplate, as hereinafter more fully described andclaimed.

In the drawings, Figure l represents a side view ofa portion ofsaw-plate, showing a tooth secured in one recess, while another recessis left vacant, in order to show its form more clearly. Fig. 2 showsviews of the saw-tooth, and Fig. 3 views of the lockingshank and rivet.

A is a saw-blade, the throat ot' which is provided with a large recess,A', having a beveled edge or triangular tongue, a., extending throughoutits length, to engage with corresponding V-shaped or triangular grooveson the inner edges of the tooth B and lockingshank G. Within the largerecess is formed a smaller recess, c', for the reception of apro- 4ojection, b', on the inner edge ofthe saw-tooth.

The tooth B is expanded or swaged at its cutting-point, as shown in Fig.2, and is provided on its inner edge with a triangular groove, b, andprojection b, for engaging with the triangular edge a and recess a ofthe saw l plate or blade. The front or outer edge of the tooth has anirregular or indented outline, which engages with one end of thelockingshank C, and is provided with arecess or socket, c, for thereception of the beveled point c on the extreme end of said shank. Thislocking-shank C is formed as shown in Fig. 3,

and has upon its inner edge a triangular groove, d, extending from itsrounded end d to the semicircular recess e, which forms, in connectionwith the corresponding recess e in the end of the saw-tooth, an oriicefor the reception of the rivet D, which, when placed in position,secures the parts, and assists, in connection with the grooves b d andtongue a, to prevent lateral movement thereof.

It will be observed that the locking-shank C, being in length less thanone-half ot' the throat-space E, may be readily removed without havingto take out the tooth and without the need of employing a wrench todisconnect the parts, which may be easily separated as soon as the rivetis removed.

I am aware that saw-teeth have been secured to the blade by means ofscrews or rivets inserted in one or more orifices made partly in thetooth or locking-shank and partly in the saw-blade, and that a saw-toothand locking-shank adapted to recesses cut in the blade are not new.These, however, I do not broadly claim but,

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The insertible saw-tooth B, having ou one edge the triangular grooveb and projection b, and on its opposite edge the recess c andsemicircular recess e', substantially as and for the purposes specified.

2. The saw-tooth B, provided with triangular groove l), projection b',and recesses c c', in combination with the recessed blade A and suitablelocking devices, substantially as shown and described.

3. The combination, with the saw-blade A, having recesses A/ a andtriangular tongue a, of the tooth B, provided with the triangular grooveb, projection b, and recesses c e', the locking-shank C, havingtriangular groove d, recess e, and beveled point c', and the rivet D,all constructed, arranged, and operating substantially as and for thepurposes specifled.

In testimony whereof I affix my signature in presence of two witnesses.

EVING C. MULFORD.

IVitnesses:

Lnwrs PARKER, Jr., WM. H. YARD.

